—Shall I attend my friend's comingofage ceremony, Mum?
—No, unless you see to ________ that you will be home before 1000 PM.
| A．one | B．this | C．it | D．her |
_______ are the days when the teachers were looked down upon .
| A．Gone | B．Go | C．To go | D．Going |
Mr. Wang was such a good teacher _______ the students love and respect.
| A．who | B．whom | C．that | D．as |
Until the present century, ________ demand for natural gas.
| A．little | B．and little | C．there was little | D．was there little |
By the end of this year, we _____ 2000 English words.
| A．will learn | B．would learn |
| C．have learned | D．will have learned |
_______ knows the truth will tell you about it , I think .
| A．Who | B．No matter who | C．Whoever | D．B and C |