________caused the accident is still a complete mystery.
Hurry up,Tom.It’s high time we______ to the theater.
What ______ had Bob walked farther, as far as the river bank?
— What happened to the young trees we planted last week? —The trees______well, but I didn’t water them.
.— I hear you’ve got a set of Australian coins. ______I have a look? — Yes, certainly.
When he lived there, he ______go to that book shop at the corner with his girlfriend after work every day.