----- I’m sorry . I ________ at you the other day .
----- Forget it. I was also a bit out of control of myself.
| A．shouldn’t shout | B．mustn’t shout |
| C．shouldn’t have shouted | D．mustn’t have shouted |
The reason _________ the little actress has been such a success is ________ she is both clever and hardworking.
| A．why; that |
| B．why; why |
| C．that; because |
| D．for; because |
I have no idea _______ we can do with these waste materials.
| A．that |
| B．what |
| C．whether |
| D．if |
FBI stands _________ Federal Bureau of Investigation.
| A．in |
| B．by |
| C．for |
| D．with |
His work _________ have been completed; otherwise, he wouldn't be enjoying himself on the beach.
| A．should |
| B．must |
| C．can't |
| D．shouldn't |
He wondered __________ the pyramids were built.
| A．what |
| B．that |
| C．if |
| D．how |