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1.There boy (run).............is running............................in the street at the moment.
2.Water (boil).................boils.........................at 100 degree C.
3.If she (work) hard,she (pass).............will pass................the final exam.
4.Did you like going(swim)...................swimming.........................last summer?
5.Are you able (write)..................to write.......................letters in English?
6.Look! It (rain)...............is raining....................heavily outside.
7.She spends an hour (do)...............doing...........................her homework everyday.
8.It (often be)....................is often....................hot in summer.
Đáp án là: is taking.