— Is there an express to Beijing tonight?
— There ______ be, but you’d better call the booking office to make sure.
| A．can | B．might | C．will | D．must |
---- I drove to Zhuhai for the air show last week.
---- Is that ______ you had a few days off ?
| A．why | B．what | C．when | D．where |
I still remember ______ this used to be a quiet village.
| A．when | B．how | C．where | D．what |
It is widely ______that smoking can cause cancer.
| A．believed | B． think | C．say | D．hoped |
____appeared to me that he enjoyed the food very much.
| A．What | B．It | C．All that | D．That |
____all the inventions have in common is ____they have succeeded.
| A．What; what | B．That; that | C．what; that | D．That ; what |