Can I _______ your bike for a day? —Certainly.

Do you think necessary to do a bird count ?Yes , we must count them at least once a year

Tell Tom to call me as soon as he ________ .

I left my keys in the room yesterday. I had to get in_____ the window.— It’s dangerous to do that.[ ]

What would you like to drink ? －It doesn’t matter. ________will do .