5.The growing speed of a plant is influenced by a number of factors, _______ are beyond our control.

Some researchers believe that there is no doubt ______ a cure for AIDS will be found.

There is no salt left.Jim, would you like to get ________ —OK, Mum!

Tom ______ be in his office so late that night. I saw him with his friends in the restaurant .

We ______ hurry－there’s plenty of time. —So we can have a coffee nearby.