A hot balloon blew up in Egypt. There ________ something wrong with the quality of it.
| A．may have been | B．must be |
| C．need have been | D．might be |
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 |