Give the correct form of the words. Lan was absent from class because of her .................... (sick)

Choose the word or phrase that best completes each unfinished sentence. I won’t lend you this money ........... you promise to pay it back. A. in case B. if C. otherwise D. unless

Choose the correct option to fill in the blank of the sentence: If we pollute the water, we _____ no clean water to use.

Put the verbs in brackets into the correct tenses. If I find your passport, I (telephone) ............ you at once.

Rewrite these sentences, using an “if” construction. My number isn’t in the directory so people don’t ring me up.

Put the verbs in brackets into the correct tenses. If he (read)............. in bad light, he will ruin his eyes.