Everyone makes mistakes in life．The key is not to repeat ________ again．（ ）
A．itB．thisC．thatD．them
—_________ will Liu Yang stay in the space station this time?
—For six months.
| A． |
How long |
B． |
How often |
C． |
How much |
D． |
How soon |
After taking tennis classes, Tim is much ________ than last year.
| A． |
strong |
B． |
stronger |
C． |
strongest |
D． |
the strongest |
—_________ I take photos here?
—Sorry, you can’t. It’s not allowed in the museum.
| A． |
A |
B． |
Need |
C． |
Can |
D． |
Will |
We have history class ________ three o’clock every Friday afternoon.
| A． |
at |
B． |
on |
C． |
in |
D． |
to |
My sister is only six, but ________ can already help with some housework.
| A． |
he |
B． |
she |
C． |
it |
D． |
they |
Must