It’s hard to make friends if you stay home alone all the time. Get out of the house and do things that will （） , listen to the top CDs, learn about what’s new with your favorite TV or movie star.

In the big cities, its hard to decide whom______.

A．making friends

B．make friends

C．to make friends with

D．to make friends

In what way can we make a machine intelligent？

A．By making it work in such environments as deserts, oceans or space.

B．By working hard for 10 or 20 years.

C．By either properly programming it or changing its structure.

D．By reproducing it.

I'm pleased to hear of your job offer-all that hard work at school has obviously ().

A、paid off

B、taken its toll

C、make a difference

D、shown up

Apparel online business ______ .

A．can meet various needs of customers

B．has comparatively lower cost than bookstores

C．is hard to make people believe its high-quality goods

D．has advantages for customers to return goods

In what way can we make a machine intelligent？

A．By making it work in such environments as deserts, oceans or space.

B．By working hard for 10 or 20 years.

C．By either properly programming it or changing its structure.

D．By reproducing it.

By "Its a tricky line to follow", the author means

A.its difficult to distinguish educational apps from entertaining ones

B.all video games and apps make children learn something useful

C.the users guides of some video games and apps are hard to follow

D.children are too young to understand the educational aspects of games

Apparel online business ______ .

A．can meet various needs of customers

B．has comparatively lower cost than bookstores

C．is hard to make people believe its high-quality goods

D．has advantages for customers to return goods

Apparel online business______.

A．can meet various needs of customers

B．has comparatively lower cost than bookstores

C．is hard to make people believe its high-quality goods

D．has advantages for customers to return goods

Why does the author mention the Stanford scientists in the second paragraph？

A．To compare hard work done by Roslin Institute to that of the two Stanford scientists.

B．To prove that scientific research can make money be the patent.

C．To suggest that why Geron-Roslin is keen to get its patent.

D．To underline that Geron company is money-oriented.