It has been() that the food people eat affects their health.
A、proving
B、prove
C、proves
D、proved
第1题
Nowadays mystery shoppers are armed with a number of high-tech devices()for recording the entire experience.
A、all of the events occurring
B、things seen and lived through
C、the act of doing and observing
D、knowledge gained by doing and observing
第3题
He was()when he heard the bad news.
A、in high spirits
B、depressed
C、having a good time
D、cheerful
第4题
It was() late to save the drowning boy as he had gone down for the third time.
A、so
B、too
C、such
D、much
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