2 . I used to feel like 50 percent of my time________ researching new restaurants.

A．were spent

B．have been spent

C．was spent

D．has been spent

3 . If we’re lucky, AI might think we’re valuable enough to keep around. ________, it might wipe us all out.

A．If so

B．If not

C．If possible

D．If necessary

4 . A drop of water and a little pity—— that is ________ I can repay with my life.

A．more than

B．less than

C．rather than

D．other than

5 . ________ I say is that my pictures aren’t hurting anyone, so who cares?

A．That

B．Which

C．What

D．As

7 . People ________ interest is exploring the relationship between art and science will enjoy Singapore’s ArtScience Museum.

A．Who

B．which

C．whom

D．whose

8 . You must speak louder ________ you can be heard by all especially those seated at the back.

A．in order that

B．on condition that

C．so long as

D．in case

9 . ______ we make a decision, in most circumstances, there is no going back.

A．Before

B．Until

C．Unless

D．Once