—What did our geography teacher say?
—She told us that the earth _____ around the sun.
| A．moves | B．moved |
| C．has moved | D．was moving |
He felt tired， so he stopped______a rest under the tree．（ ）
| A． |
having |
B． |
have |
C． |
to have |
Get up early，_____ you will miss your train．（ ）
| A． |
or |
B． |
and |
C． |
but |
I _____ a math problem with Joe when Mike called me up．（ ）
| A． |
have discussed |
B． |
discussed |
C． |
was discussing |
The nurse _____ is looking after the old man is Tom's sister．（ ）
| A． |
which |
B． |
who |
C． |
what |
She is_______famous singer in China and has many fans．（ ）
| A． |
the |
B． |
a |
C． |
an |