—What’s the low-carbon (低碳的) lifestyle like?
—Save ___________ energy, produce ___________ carbon.
A. less; more B. less; less C. more; less
I fell down and broke three of my teeth. I wonder how many times I have to come here to get my broken teeth _______.
| A．fix | B．fixing | C．fixed | D．to fix |
—What do you usually do in the morning?
－ I often practice__________ English.
| A．speak | B．to speak | C．speaking | D．spoke |
Eric is so careful that he always looks over his exercises to ________ there are no mistakes.
| A．make sure | B．find out | C．think of | D．look for |
Excuse me ,sir. You ______ open the door before the train stops.
| A．mustn’t | B．needn’t | C．may not | D．don’t have to |
The movie wasn’t ______.He fell asleep half way through it.
| A．interesting enough | B．enough interesting |
| C．interested enough | D．enough interested |