I have lost one of my gloves. I _____ it somewhere.
| A．must drop | B．must have dropped |
| C．must be dropping | D．must have been dropped |
Shy people often avoid situations _________ require close contact with other people.
| A．that | B．what | C．when | D．where |
– Is your brother going to Jack’s birthday party tonight?
– I am not sure. He _____ go to the concert with his girlfriend instead.
| A．ought to | B．has to | C．might | D．must |
_________ is not how much you do but what you do that matters.
| A．This | B．It | C．That | D．There |
The word “cool” has expanded to _________ many different meanings.
| A．take on | B．put on | C．carry on | D．get on |
Generally speaking, _________ main material for building houses has been concrete, but _________ wood and stone have also been used.
| A．the; / | B．/; / | C．the; the | D．/; the |