—Have you found the book ________ you lost yesterday?
—Yes. I left it in the library.
| A．that | B．who | C．where | D．when |
No one knows ____ in fifty years.
| A．what will our life be like | B．what is our life like |
| C．what our life will be like | D．what our life is like |
—What a beautiful sweater! How much did you _____for it?
—198 yuan.
| A．take | B．cost | C．pay | D．spend |
I ________ the film. I don’t want to see it again..
| A．have seen | B．saw | C．see | D．watch |
The singer has got a headache badly, she has to _______ singing.
| A．stopped | B．stop | C．stopping | D．stop to |
He does not know ______ they will plant trees on Saturday or not.
| A． if | B．how | C．whether | D．why |