Yesterday it rained heavily when school was over. So we _______ stay in our classroom.
A. should B. must C. had to
Itwhen Imy homework last night.
| A．raining, did | B．rained, was doing | C．was raining, do | D．rains, was doing |
They’re my grandfather and grandmother.
A. parents B. uncles C. grandparents
–Do you mind telling me how to restart the computer?
–______. It’s simple. Just press the button here.
| A．Yes, I do | B．Surely | C．Of course | D．No, not at all |
-- I' veusing plastic bags when shopping.
-- You' re right. It' s good for our environment.
| A．stopped | B．finished | C．started | D．enjoyed |
We are playing football. Come and _____________ us.
| A．join | B．join in | C．play | D．do |