It is uncertain ________ side effect the medicine will bring about, although about two thousand patients have taken it.
| A．that | B．what | C．how | D．whether |
The reason __________ he explained is not __________ I expected．
| A．why; that | B．why; what | C．that ;what | D．that; that |
--- Do you enjoy your present job?
--- _________．I just do it for a living．
| A．Of course． | B．Not really | C．Not likely | D．Not a little |
Everyone in our class was working hard and doing what we could _______ a good university．
| A．enter | B．to enter | C．entering | D．entered |
It rained heavily in the south, ___________ serious flooding in several provinces．
| A．caused | B．having caused | C．to cause | D．causing |
Large quantities of information _________ since the organization was built．
| A．has offered | B．had been offered | C．have been offered | D．is offered |