—What’s the noise outside?
—Some children_____ hide-and-seek in the yard.
| A．were playing | B．are playing | C．have played | D．played |
A lot of research and studies have shown that Trench oil, taken out from kitchen waste, ______ the increase of cancers.
| A．results from | B．attends to | C．contributes to | D．devotes to |
Don’t trust such people _____ praise you to your face but speak ill of you behind your back.
| A．who | B．whoever | C．that | D．as |
– I met Jackson at our school theatre. Can you imagine_____ well-known _____ an expert on ENT?
| A．his becoming; as | B．to become; as | C．his becoming; for | D．to become; for |
It is uncertain ___ side effects these weight-loss drugs will bring about, although hundreds of thousands of patients have taken it.
| A．that | B．whether | C．how | D．what |
On the celebration of the university’s 100th birthday, he said, “I have never experienced __________ time here as a graduate of Tsinghua University.”
| A．a better | B．the best | C．the better | D．a best |