—Must we keep the window _______ all the time?
—No, you don’t have to.
| A．opening | B．opened | C．to open | D．Open |
--Do you know the name of the cat ______ is lying on the ground?
--Of course, it’s my pet. Its name is Mimi.
| A．who | B．what | C．which | D．/ |
-- ________ your homework yet?
-- Not yet. I _______ it.
| A．Have you done; am doing | B．Did you do; am doing |
| C．Have you done; did | D．Did you do; did |
-- Did you read a book about customs last week?
-- Yes, I found ______ very useful to know the customs of foreign countries.
| A．that | B．this | C．it’s | D．it |
--You used to be quiet, ____you？
--Yes, and I used to be very shy.
| A．wasn’t | B．didn’t | C．aren’t | D．haven’t |
-- How do you study a test?
-- I studylistening to tapes.
| A．to; by | B．by; with | C．for; by | D．with; for |