The meeting ________ in the hall tomorrow is about environment protection．

A．is being held

B．to be held

C．held

D．being held

________ teachers are present today, and ________ them is 300．

A．A great many; a number of

B．A number of; the number of

C．A dozen of; a great many

D．The number of; a number of

－You don't forget when we borrowed that reference book, do you?

－I can't remember now but ________ sometime last week?

A．might it be

B．could it be

C．could it have been

D．should it have been

Mr．Johnson complained to his doctor that he _________ energy, so his doctor advised him to ________ running．

A．lacked; take up

B．lacked of; pick up

C．was lacking of; make up

D．was in lack; give up

Many teens don't get enough sleep because they have too much homework to do, which ________ them up at night．

A．makes

B．breaks

C．turns

D．keeps

－I'm terribly sorry that I have forgotten the reference book you lent me yesterday．

－________!

A．Never mind

B．Not at all

C．You're welcome

D．With pleasure

It was when I searched the Web for some information about my classmates that I ________ your website．

A．came about

B．came after

C．came at

D．came across．

－People says your little brother has been admitted into Qinghua University．

－Yes．Never ________ he could achieve so much success．

A．I had thought

B．I would have thought

C．could I have thought

D．will I have thought

We all know laws to discourage the use of plastic bags ________ in many parts of the world．

A．passed

B．have passed

C．had been passed

D．have been passed

Everybody had a(an) ________ that she was a good match for the young man．

A．attitude

B．impression

C．imagination

D．memory