— David, keep ______ in mind that you have to be home by 10 o'clock.
— OK, Mom, I will.
| A．it | B．me | C．this | D．one |
We never doubt ______ our school team will win the match against No. 3 Middle School.
| A．whether | B．that | C．if | D．what |
The teacher usually grades the students on _______ they have behaved.
| A．that | B．what | C．which | D．how |
Once _____, it won’t be easily forgotten.
| A．saw | B．seeing | C．seen | D．see |
_______ David says sound right to Helen. That’s why he has made up her mind to leave the matter to him _______ happens.
| A．Whatever; whatever | B．No matter what; whatever |
| C．No matter what; no matter what | D．However; no matter what |
On stepping into the office, the girl was frightened to find that the whole office was filled with ______ looked like tiny worms.
| A．that | B．something | C．what | D．anything |