Difficulties strengthen the mind, ______labor does the body.
| A．as | B．whether |
| C．since | D．because |
The number of the students in our school ____1200.
| A．is | B．are | C．has | D．have |
There ______ many new words in lesson one, It is very easy.
| A．is | B．aren’t | C．isn’t | D．are |
Neither Liping nor I _______a basketball player.
| A．am | B．is | C．be | D．are |
—How many lessons do you usually have a day?
—Six lessons a day. And each of them _____45 minutes.
| A．last | B．lasts | C．have | D．are |
Two days _______enough for me to finish the work, I need a third day.
| A．isn’t | B．is | C．aren’t | D．are |