Where were you at ten o’clock this morning?—I ________ with my friends in the park at that time.

Drivers in England drive cars on the left of the roads.– .

The letter____Tommy received from his company yesterday is very important.

I find _______ necessary to take some warm and dry clothes with us during the walk.

How did the Chinese doctors get to Haiti (海地) to help the people there? — They got there ______ plane. [ ]