Don’t start reading a book _____ you find that it’s one you can read with ease and understanding.
—Do you think I could borrow your bike?—________.
At present ________ of the experiments ________done in labs after the new building has been finished.
In recent years travel companies have succeeded in selling us the idea that the further we go, ________.
Everybody said it was a perfect marriage; no one had ever known________couple.
—There is no way for us to book ________apartment. —Thus we will have to make full use of what we have now.