30.—Why did you leave the lights burning?
—Heavens! I guess I__________to turn them off.
| A．would forget | B．had forgot | C．forgot | D．have forgot |
A lot of people often forget that oral exams ______ to test our communicative ability．
| A．design | B．are designed |
| C．are designing | D．are being designed |
I have no idea ______ the journalist could have got his information from.
| A．that | B．why | C．why | D．where |
The banker was found in a remote village after ______ his office last Thursday.
| A．leave | B．being left | C．leaving | D．having been left |
I’m sure you will do better in the test because you ______ so hard this year．
| A．studied | B．had studied |
| C．will study | D．have been studying |
You’d be exposed to a lot ______ pollution if you moved to a town with pure water and air.
| A．more | B．most | C．less | D．least |