We know that a smile is usually a sign _____ people feel friendly and happy, but _____ we don’t know who the new person is?
| A．that; what if | B．when; what |
| C．when; how about | D．if; how |
One of the sides of the board should be painted yellow, and ______.
| A．the other is white | B．another white | C．the other white | D．another is white |
-- Why don’t we take a little break?--- Didn’t we just have ___?
| A．it | B．that | C．one | D．this |
---- Can you come for dinner on Saturday or Sunday?---- I’m afraid day is possible.
| A．either | B．neither | C．some | D．any |
I agree with most of what you said, but I don’t agree with ______.
| A．everything | B．anything | C．something | D．nothing |
There’s a feeling in me ____we’ll never know what a UFO is - not ever. （
| A．that | B．which | C．of which | D．what |