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BT1. Write the correct tense or the verbs in brackets.

1. Alex ........................( not do ) the gradening before it started raining. 

2. The amount of plastic in the ocean .................. (increase ) if we ................ (not take) action now . 

3. Outdoor air pollution............(cause) more than 80,000 wildfires so far this year .

(1) Where are you from ?

(2) How long have you been in Viet Nam ?

(3) Have you visited any tourist attractions ?

(4) Where did you go ?

(5) Where are you going to next ? 

There is so much light in the city at night . We can not see the stars clearly

-> if there weren't so much light in the city at night . We could see the starts cleary. 

1. A 

2. C