Most birds find it safe to sleep in the trees, but ______ they have eggs or young chicks, they don’t use a nest.
| A．why | B．how | C．where | D．unless |
----Won’t you go shopping with your mother ?
----____she promises to buy me a new sweater .
A When B If C Unless D Whether
The lecture begins at 9 tomorrow morning .So I have to be at the hall ____8:40 pm. at the latest.
A until B after C by D around
______the sales of computers up by 20%every year ,our company is becoming larger .
A As B For C With D Through
Which is the longest bridge ______the Changjiang River , do you know ?
A through B across C on D over
----It is _____impossible .
-----You mean it’s out of the question ,do you ?
A very B quite C fairly D rather