___________ we should do to protect wildlife?
| A．Do you think what | B．Do you think how |
| C．What do you think | D．How do you think |
---- Did he give you advice on your work yesterday?
---- Yes. But his advice, as a matter of fact, ______ my difficulty.
| A．used to | B．related to | C．added to | D．belonged to |
Mountain climbing ______ be really dangerous at times even though it is challenging and exciting in general.
| A．can | B．should | C．shall | D．must |
The music, ____________ pleasant, was soon well received when it was taken to the stage.
| A．sounded | B．being sounded | C．sounding | D．having sounded |
----Did the reference give the information you needed?
----Yes, but it, I had to read it entirely.
| A．to find | B．having found | C．finding | D．find |
You ________ your son to watch TV for too long hours! See, Mr. Morrison called that he didn’t finish his homework yesterday.
| A．are always permitting | B．have permitted | C．permit | D．permitted |