There is long way to go for scientists to study _____space.
| A．a | B．an | C．the | D．/ |
—Excuse me，can I sit beside you?
— ．The man who sat here will be back soon．
| A．Yes，please | B．You’re Welcome |
| C．No problem | D．You’d better not |
Our English teacher tells us to spend as much time we can English．
| A．listen and speak | B．listening and speaking |
| C．to listen and speak | D．to listen and to speak |
I find this Math problem very .believe students can work it out ．
| A．easily；easy | B．easy；easily |
| C．easily；easily | D．easy；easy |
He thought difficult for the students to pass the exam．
| A．it’s | B．that | C．／ | D．it |
Could you please the children with the snake?
| A．to ask；not to play | B．ask；not to play |
| C．ask；not play | D．ask；don’t play |