7. It's very important to keep your passport in a safe place
A. You really can have kept your passport in a safe place
B. You really must keep your passport in a safe place
C. You really can be keeping your passport in a safe place
D. You really must have kept your passport in a safe place
8. You should write your name in capital letters.
A. Your name should be written in capital letters
C. Your name in capital letters should be written
B. Your name should have been written in capital letters
D. Your name was written in capital letters
9. We cut down many forests. The Earth becomes hot.
A. The more forests we cut down, the hotter the Earth becomes.
B. The more we cut down forests, the hotter the Earth becomes.
C. The more we cut down forests, the Earth becomes hotter.
D. The more we cut down forests, the Earth becomes hotter.