1.     The lifeguard warned these children _______not to swim_________ (not swim) far from the shore.

2.     My mother advises me _________not to stay_______ (not stay) up too late at night.

3.     It is compulsory for the employees _____to wear_____ (wear) the uniforms at work.

4.     Janet often practices ________playing________ (play) football on Sundays.

5.     It is not worth _________buying_______ (buy) those old boots.

6.     Jimmy risks _______climbing_________ (climb) up this high mountain.

7.     Those students postpone ________going_______ (go) to see their head teacher.

8.     Amy suggests ______flying________ (fly) to Hanoi instead of ________going______ (go) by car.

9.     Don’t forget ________to lock________ (lock) the doors before you leave.

10.  We encourage Peter ______to register_______ (register) for this singing competition.

11.  Hannah is often busy ______helping__________ (help) poor people in her area.

12.  Our managers plan ________to build________ (build) a new office in the suburb.
13.  It is no good ______going______ (go) fishing here because the water is polluted.