I saw Mary ____ the house.
| A．open the door and go into | B．to open the door and to go into |
| C．open the door and to go into | D．open the door and went into |
is known to us is that tobacco contains nicotine and other harmful products，so you should give up smoking．
| A．As | B．It | C．What | D．Which |
——Which of the two souvenirs do you like better?
——blue one．of course．I think it's reallymost instructive one．
| A．A；the | B．The；the | C．The；a | D．A；a |
—When are you leaving for Guangdong?
—My planeat six．
| A．took off | B．would take off | C．will take off | D．takes off |
well prepared you are，you still need a lot of luck in finding a suitable job．
| A．However | B．Whatever | C．No matter | D．Although |
—There's someone knocking on the door．Whoit be?
—It must be Mary．She promised to be here at 8：00．
| A．must | B．can | C．shall | D．need |