This is not an economical way to get more water; ____, it is very expensive.
| A．on the contrary | B．on the other hand |
| C．on the whole | D．on earth |
–----- Have you been to the Great Wall?
------ Perhaps not in my memory. _______, it might have been during my early childhood.
| A． If only | B．If so | C．If ever | D．If not |
I didn’t know this years ago ,but recent science ____that inharmonic marital(婚姻的) life like quarrels or fights harms one’ heart.
| A．showed | B． is showing | C．has shown | D．shows |
As most of their houses were badly damaged after the earthquake, many people had to be ________ in a stadium．
| A．put away | B．put up | C．put out | D．put off |
. —How can I thank you?
—Don’t mention it. Any other man in that case _______ the same thing.
| A．would have done | B．could have done |
| C．must have done | D．should have done |
Zhang Yining has trained continuously for six hours. ______ she is tired out.
| A．There is no wonder | B．There is no need | C．It’s no wonder | D．It’s no doubt |