1. Our English teacher often says we ______ remember enough English words.
A. mustn’t B. shouldn’t C. cannot D. needn’t
2. In recent years ______global warming is becoming ______concern of people all over the world.
A. the, the B. /, / C. /, a D. the, /
3. Mr. White, who comes from ______European country, has formed ______ habit of attending _____ church on Sundays.
A. an, /, the B. a, the, / C. an, the, / D. a, a, a
