上消化道出血最常见的原因是A．急性胃黏膜病变B．消化性溃疡C．胃癌D．食管胃底静脉曲张破裂E．慢性胃

A．if he knew

B．if he knows

C．he had known

D．had he known

听力原文：She could have closed the garage door.

Did she close the garage door？

A．Yes, she did. I asked her to close it.

B．No, she didn't though she could.

C．No, but she is going to close it.

D．Yes, she did.

A．if he knew

B．if he knows

C．he had known

D．had he known

When the writer asked for a divorce, her husband ______.

A．told her that she would never find one who loved her as he did

B．delayed two years before giving her a reply

C．accused her of having an affair

D．said that she was unattractive and not worth loving

Anne asked Tom ______ the key.

A．when he left

B．where he had left

C．how had he left

D．why did he leave

The nurse asked the patient ______.

A. if he was feeling any better

B. whether he wanted to do anything

C. if he needed her help

D. whether she was a warm-hearted lady

He asked no one's permission; he did it ______ his own account.

A．for

B．with

C．on

D．from