Question

--- Where is Mike now？
--- Look! He _______the classroom.

A．cleans

B．cleaning

C．is cleaning

D．to clean

Answer 1

C

本題考查一般現(xiàn)在時的構(gòu)成。現(xiàn)在進(jìn)行時態(tài)由be + v-ing構(gòu)成。