In order to find better job, Tom made up his mind to learn second foreign language.
As we know, ________ is good exercise and it is necessary for health.A. walk B. walks C. walking
—Must I finish my homework before I go home?—No, you ________. But you ________ finish it before tomorrow.A. mustn’t, mustB. needn’t, must C. needn’t, mustn’t
—Must we keep the window________ all the time? —No, you don’t have to.A. open B. opened C. opening
James is ________ boy.A. a 18-month-oldB. an 18-months-oldC. an 18-month-old
Germs are very small. They can ________ the human body ________ the skin.A. get up, acrossB. get into, throughC. get into, across