UNIT 6 GRAMMAR: OBLIGATION AND PROHOBOTION

WHALES ARE IN DANGER. WE _____ PROTECT THEM.

STUDENTS _____ WEAR VINSCHOOL UNIFORM TO CLASS.

TO SAVE THE EARTH, WE ___ PROTECT THE PLANTS AND TREES. A. HAVE TO B. DON'T C. MUST D. BOTH A AND C

YOU ___ USE PHONES IN CLASS.

___ POLLUTE THE AIR IF YOU WANT TO BE HEALTHY.

WRITE YOUR ANSWER ON MINI BOARD. ___ RUN OR TALK TOO LOUD IN THE LIBRARY.

____ LEAVE YOUR WORKSHEETS ON THE FLOOR. A. DON'T B. CAN'T C. MUST

_____ TALK IN CLASS WHEN YOUR TEACHER IS TEACHING. A. MUST B. DON'T C. HAVE TO

YOU _____ COPY YOUR FRIENDS WHEN YOU ARE HAVING A TEST. A. MUST B. HAVE TO C. CAN'T

_______ bottles and cans into the sea. a. We must throw b. don't throw c. Don't clean