3. I think playing the guitar is more interesting than cycling htđ: N số ít+ is
4. Look! They are donating books. Will you join them?
Look! => httd: S+ tobe+Ving
will+ S+V?
5. Thousands of people do volunteer work every year every year=> htđ: S+ V(s/es)
6. We have made hundreds of coats for the poor so far so far=> htht: S+ have/has+ P2
7. The projects to call for soccial contribution has just begun just=>htht: S+ have/has+ P2
8. Did you close the door when we left home? when we left home=> qkđ: Did+ S+ V?
9. Beck likes collecting postcards of natural w htđ: S+ V(s/es)
10. He is also taking some photos of Ha Long Bay now now=> httd: S+ tobe+Ving