Tom hid himself behind the door, _______ he rushed out to scare his mother.
| A．which | B．where | C．from which | D．from where |
Jumping out of_______________airplane at ten thousand feet is quite _______________ exciting experience.
| A．/; the | B．/; an | C．an; an | D．the; the |
. Some birds fly_______________in winter and some stay in the north.
| A．south | B．the south | C．in the south | D．to south |
The book,_______________as a surprise for his sister was lost in the mail.
| A．intended | B．to be intended | C．Intending | D．being intended |
Between the two roads_________ a TV tower called“Skyscraper Tower”.
| A．stands | B．standing | C．which stands | D．stand |
______
__________ surprised us very much that Tom should have left without a word.
| A．He | B．It | C．This | D．That |