It is ______ to rain this afternoon.

---Have you been to the National Theatre? ---No, but I’ve         bought two tickets for the concert to be given this weekend.

 Autumn coming, the leaves have ________turned into brown color.

 There was such a long queue for coffee at the interval that we _____gave up.

The value of a leader is something to be felt and experienced.         can it be put into words.

This tree looks high and strong but ____ its trunk is hollow.

The house, which is large and is surrounded by trees and flowers, is       what she longs for ．

—Jane, Peter has got a well-paid job in a foreign company.—You mean he is much _____ now.

The members of the board are discussing the problem right now; it will _____ have been solved by the end of next week．

Our bodies are strengthened by taking exercise．_______ our minds are developed by learning．

As is known to all language learners, the newly learnt words will soon be forgotten unless______ used in everyday communication.

The dog, if trained _____, will be made a good watch-dog one day.

I might fail, but _______ I insist on doing it. I don’t mind what the result will be.

 If you lose a customer, regret it _____ excuse it, or you will lose him for ever.

 I want to see him       he arrives. Which of the following is wrong.

In order to make up for the lost time, they are working ______.

 _________, the subject belongs to biology.

When we got there, he was about to leave. So he only had time to explain _______ to us how he ________ our plan.

—Hi, I hear you’re going to London this summer vacation. —            , I was going to, but now I have changed my plan.

After ten years abroad, he still recognized his old colleagues ________ he set foot in China．