－Are you sure you have to? It’s been so late. Make it another time?
－I don’t know ________ I can do it if not now.
| A．how | B．what | C．when | D．that |
Please tell me how the accident _________ . I am still in the dark.
| A．come to | B．come by | C．come across | D．come about |
Jack always sleeps late on Sundays. I am sure he _______ when we get home.
| A．is still sleeping | B．is to be sleeping |
| C．will still be sleeping | D．will have been sleeping |
The box ____ two meters by two meters and ____ a ton.
| A．measures; is weighed | B．is measured; is weighed |
| C．is measured; weighs | D．measures; weighs |
It never occurred to humans until the mid-1990s ______ some animals can be cloned.
| A．where | B．that | C．when | D．what |
I’ll prepare more dishes_________ your guests decide to stay for dinner．
| A．in case | B．in order that | C．even if | D．as if |