---Where was your sister at this time yesterday evening ?
---She was writing an e-mail ______ I was watching TV at home.
| A．after | B．as soon as | C．while | D．until |
–I ______ know you can play the piano so well.
--Thank you.
A. didn’t B. don’t C. can’t
These are my parents. They ______ workers.
A. am B. are C. is
A ______ tree is near the river
A. big B. old C. fat
—Shall we go ______ tomorrow, dad?
--Good idea.
A. swam B. swimming C. swim
–It is hot today, ______?
--Yes, it is.
A. aren’t they B. don’t you C. isn’t it