I remembered having locked the door, but I came back to .
| A．take off | B．put up |
| C．make sure | D．used to |
Can you tell me ___________________? You look upset.
| A．what the matter is | B．what matter it is |
| C．what is the matter | D．what was the matter |
These shoes look very nice. I wonder _______________.
| A．how much they are cost | B．how much do they cost |
| C．how much are they cost | D．how much they cost |
Eastern areas have ________ too many wars in the past fifty years.
| A．gone through | B．got through | C．looked through | D．lived through |
A U.N. peace-keeping _______ was sent to that country and the soldiers would devote all their _______ to their job.
| A．power; energy | B．power; strength | C．force; energy | D．force; strength |
The book is primarily ___________ Soviet-American relations during the Cold War.
| A．concerned about | B．concerned with | C．concerned for | D．concerned in |