问题
_____did the space flight last? —Twenty-one hours.[ ]
A:How many
B: How long
C: How soon
D: How often
B: How long
C: How soon
D: How often
正确答案是：
同类题型
Ann’s home is about ten kilometers_________school.[ ]
Mr. Fat has _______ money than Mr. Thin, but he has _______ friends.
Great changes have taken place since then in the primary school _______I am studying.
He took down the old map on the wall and ______ a new one instead.
The boy doesn’t speak ______ his sister, but his writing is ______ good.[ ]