The fireman started to put out the big fire_____ arriving at the burning building.
| A．by | B．on | C．at | D．in |
He was sitting in an armchair, ___ a novel
| A．reading | B．read | C．was reading | D．to be reading |
Only then ___ that he had made a mistake.
| A．he realized | B．did he realized | C．realized he did | D．did he realize |
--Do you like to study mathematics?---____? I like it very much.
| A．No | B．Not | C．Why not | D．Not why |
The students of Class Two said that they had no difficulty ___ those sentences into English.
| A．to put | B．of putting | C．for being put | D．in putting |
The ship, ___ 1500 passengers , set off on its first trip on a cold winter day.
A. carriedB, carryingC. to carry D. being carried