While building a tunnel through the mountains, ______.
| A．an underground lake was discovered | B．there was an underground lake discovered |
| C．a lake was discovered underground | D．the workers discovered an underground lake |
Oh, it’s so cold in here. Somebody ____ the window, please.
| A．closes | B．close | C．shall close | D．will close |
-----Excuse me. Could you direct me to the nearest post office?
______ straight on and you’ll see it on your right.
| A．When going | B．Going | C．If you go | D．Go |
–----- 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 |