__________is mentioned above，the number of the students in senior high schools is increasing.
| A．Which | B．As | C．That | D．It |
So diffcult____it to fit in at school that she decided to drop out.
| A．found she | B． did she find | C． she found | D． she did found |
Wait for a while .I will get you something to drink.
Don’t ____.I have to leave now.
| A． worry | B． interrupt | C． disturb | D． bother |
This is the second time I____a call from that telephone number.
| A． have received | B． had received | C． received | D． receive |
AsＩ ____the house ,I noticed a light on upstairs, which made me quicken my pace towards the doorway.
| A． left | B． passed | C． entered | D． approached |
____ wisest alternative is to work hard today in order that we will enjoy ____better tomorrow.
| A． The;the | B． A ; a | C． The ; a | D． A ; the |