1 . My English teacher often advises us ________ (not forget) to speak English after class.

2 . The World Earth Day is a day to remind people________(protect) the earth.

3 . Tom told me _________（not touch）anything in the science museum.

4 . We saw the sun ________ behind clouds and then it began to rain heavily. (appear)

5 . Doctor Zhang advises us __________ (not get) together in public because of COVID-19.

6 . Please tell your father not ________ (forget) the talk tomorrow.

7 . Dolphins use sound to __________ with each other. (communication)

8 . Most students don’t want their parents to c________ themselves with others.