-Do you know _______ World Water Day is?
-On March 22nd.
A.when | B.where | C.what | D.which |
I didn’t know which shirt was better, the black one or the red one, so I took them.
A.all | B.each | C.none | D.both |
--- Are you going to take part in the writing competition?
---________. It’s too good a chance to miss.
A.That’s for sure. | B.Never mind | C.Cheer up | D.My pleasure |
Uncle Mike _______ to bed ______ he finished his work last night.
A.not went; before | B.didn’t go; after |
C.doesn’t go; until | D.didn’t go; until |
Scientists are working hard to make _______ possible for people to live on Mars in the future.
A.it | B.that | C.this | D.one |
After you see the pictures, you will realize ______ danger the wildlife faces.
A.how many | B.how often | C.how much | D.how long |