Nuclear ______ be really dangerous at times even though it’s a nice energy in general.
| A．shall | B．should | C．can | D．Must |
"I've never found a better job." "_________."
| A．I don't think so | B．Too bad | C．Congratulations | D．Don't worry |
"She's not a dancing teacher, is she?" "________."
| A．Yes, and she isn' | B．Yes, but she was |
| C．No, but she isn't | D．No, but she was |
Jim is ___ person, and everyone is willing to be ______ with him.
| A．so kind a, friends | B．so a kind, friends |
| C．so kind a, friend | D．so a kind, friend |
They kept trying _________ they must have known it was hopeless.
| A．if | B．because | C．when | D．where |
There are five pairs _______, but I'm at a loss which to buy.
| A．to be chosen | B．to choose from | C．tochoose | D．for choosing |