..........he had finished his work, he watched a comedy.

• Before

• After

• Until

• During

If we use electricity carefully, more people............electricity to use.

• will have

• would have

• have

• are having

The book.............by my grandpa in 1998.

• is written

• was written

• was wrote

• are written

Before we came, they.................out.

• have gone

• has gone

• went

• had gone

Air................ can cause serious health problems

• polluting

• pollution

• polluted

• pollute

Jane is very hard-working, she takes care...........the garden very carefully.

• of

• with

• on

• at

Every morning, we............ to school by our grandfather.

• are taken

• took

• is taken

• were taken

Từ đồng nghĩa với từ: EXTINCTION

• APPEARANCE

• DISAPPEARANCE

• HAPPINESS

• EXPLORATION

Từ đồng nghĩa với: POLLUTED

• CONTAMINATED

• BORED

• INTERSTED

• NEEDED

Từ nào đối nghĩa với ACCEPT

• REJECT

• ARRIVE

• PASS

• SUCCEED