I________all the cooking for my family，but recently I've been too busy to do it.
| A．will do | B．do |
| C．am doing | D．had done |
He placed one of the arrows __ his bow.
| A．in | B．on | C．at | D．against |
___ from a plane, the Great Wall looks like a huge dragon.
| A．Seeing | B．Seen | C．To see | D．Look out |
Africa is actually connected with Asia at the spot ___ the Suez Canel was dug.
| A．when | B．where | C．which | D．and |
Many buildings ___ in the eathquake.
| A．put down | B．lay down | C．fell down | D．knocked down |
Some weak bridge may not ___ in an earthquake.
A,stay up B. fall down C. fell down D. fell off