—These grapes look really beautiful.
—They ______！See the price，$3.99 a pound.Very expensive，aren’t they！
| A．would | B．could | C．might | D．should |
In such dry weather, the flowers will have to be watered if they ____________
| A．have survived | B．are to survive |
| C．would survive | D．will survive |
It is the protection for the trees___________ really matters, rather than how many trees are planted.
| A．what | B．that |
| C．不填 | D．which |
You can't see the___________ now for they are having a meeting at the moment.
| A．editor-in-chiefs | B．by an hour |
| C．by hour | D．each hour |
He has a part - time job and was paid___________.
| A．by the hour | B．by an hour | C．by hour | D．each hour |
The sunlight came in____________ the windows in the roof and lit up the whole room.
| A．through | B．across | C．by hour | D．each hour |