Nuclear energy __________ be really dangerous at times even though it's a nice energy in general.
| A．shall | B．should |
| C．can | D．must |
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If you’re looking for a________, you can make it when it is on sale.
| A．bargain | B．price | C．cost | D．bill |
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---Putting on a happy face not only helps us make friends but also makes us feel better.
--- ________.
| A．I’d love to. | B．I’m with you on that. |
| C．It’s up to you . | D．It’s my pleasure. |
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If you ________ be quiet, I will tell you what happened.
| A． will | B．may | C．shall | D．must |
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－Did you have a good sleep last night?
－Yes, never sleep ____．
| A．badly | B．better | C．worse | D．best |
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________the weather, the sports meet will be held on time.
| A．Instead of | B．In relation to | C．Regardless of | D．In favor of |