I think you should complain----______, of course, you are happy with the way things are.
| A.if | B.unless | C.as | D.because | 
—What’s that building?
 —the medical equipment is stored.
| A.There’s in which | B.That’s where | 
| C.The building that | D.That’s the building which | 
I knowhe said so at the meeting is true.
| A.what | B.how | C.why | D.that | 
—Do you think that man will come to your help?
 —I really don’t knowa person like him can help me with.
| A.how | B.what | C.why | D.if | 
I must think of a proper gift for my mother,won’t be expensive but will make her happy.
| A.who that | B.the one which | C.it | D.one that | 
After five hours drive,they reachedthey thought was the place they’d been dreaming of.
| A.that | B.where | C.which | D.what |