The ground is wet all over, so I’m sure it must have rained last night, ________?
| A．wasn’t it | B．didn’t it | C．isn’t it | D．doesn’t it |
. Information has been put forward ________ more middle school graduates will be admitted to universities.
| A．while | B．that | C．when | D．as |
. Evidence came up ________ specific speech sounds are recognized by babies as young as months old.
| A．that | B．whose | C．which | D．what |
. The theory is of great important ________ the hotter a body is, the more it radiates.
| A．that | B．when | C．which | D．what |
. There’s a feeling in me ________ we’ll never know what a UFO is – not ever/never.
| A．that | B．which | C．of which | D．what |
. There are signs ________ restaurants are becoming more popular with families.
| A．that | B．which | C．in which | D．of which |