Will you ____ it that my birds are looked after well while I'm away?
| A．see to | B．turn to | C．turn off | D．see off |
Standing inside ____ lots of strange creatures with white skin and large black eyes.
| A．was | B．is | C．were | D．be |
—I have been waiting for you so long.
—Sorry, I have been in the library, _______ my friend look for some books.
| A．helped | B．helping | C．to help | D．help |
I think humour is a vital form of entertainment, ____ it makes us laugh and laughing keeps us healthy.
| A．when | B．after | C．if | D．because |
The UN is an important international organization _____helps many people around the world.
| A．who | B．that | C．where | D．/ |
When you get on stage for the first time, you may be surprised by ______bright the lights are.
| A．what | B．so | C．how | D．too |