14. Researchers on the environment have made some important __________. A. discoveries B. destructions C. congratulations D. science 15.Alth

14. Researchers on the environment have made some important __________.
A. discoveries B. destructions C. congratulations D. science
15.Although He is very busy, He tries to find time to ______ to his parents every weekend.
A. take a break B. take care C. pay a visit D. look after
16. Mrs. Lan: “Could you do me a favor” + Mr. Nam: “____________.”
A. No problem B. Yes. Thank you C. No. I’m fine D. That’s very kind of you
17.After their campaigns, they’ve passed new laws to ________ wildlife in these jungle areas.
A. prevent B. celebrate C. conserve D. damage