30. Even if you are an experienced teacher, you sometimes ____ make some mistakes.
| A．can | B．must | C．should | D．Will |
The trouble is ________we are short of hands.
| A．what |
| B．that |
| C．how |
| D．which |
She wanted to know ________.
| A．whether I knew her and where did she work |
| B．if I knew her and the factory she worked there |
| C．whether I knew her and factory she worked |
| D．if I knew her and the factory where she worked |
No one knows when and where________.
| A．was she born |
| B．did she come from |
| C．she work |
| D．she was born |
My hometown is not ________it used to ________ ten years ago.
| A．when; do |
| B．what; do |
| C．what; be |
| D．when; be |
He ________ to me that he had ________several eggs on the table.
| A．lay; laid |
| B．lied; lay |
| C．lain; laid |
| D．lied; laid |