31. The engine of the bus was out of order and the bad weather ______ the worries of the passengers.
—What has made him look like lacking sleep?—_______ his wife is ill and he has to get up several times a night to attend to her.
I don’t like ___ of the three books. Only one in particular has attracted my attention.
Look before you leap! You have to ______the costs of the new system against the benefits it will bring.
If you have a job, ________ yourself to it and finally you’ll succeed.
_________, so he is afraid of dogs .