14. Tổng hợp 12 thì

Đây là bài tổng hợp các thì, hãy đọc kỹ và chọn/điền đáp án đúng nhất

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In all the world, there (be) ____ only 14 mountains that (reach) ______ above 8,000 meters.

(a)  

He sometimes (come) (a)   to see his parents.

When I (come) ______, she (leave) _____ for Dalat ten minutes ago.

(a)  

My grandfather (never, fly) (a)   in an airplane, and he has no intention of ever doing so.

We just (decide) (a)   that we would undertake the job.

I knew that this road (be) (a)   too narrow.

Right now I (attend) ______ class. Yesterday at this time I (attend) ________ class.

(a)  

Tomorrow I'm going to leave for home. When I (arrive) (a)   at the airport, Mary (wait) will have waited for me already.

Margaret was born in 1950. By last year, she (live) (a)   on this Earth for 55 years.