1/............. air can cause illness and even death
A .polluted B.pollution C. Polluting D.Pollute
2/Mr Toan ............. teaches us Biology is wearing a blue shirt
A. Whom B. Who C. Which D. Whose
3/ if we plant more trees along the streets, we......... the amount of pollution in the atmosphere
A. Reduce B. Reduced C. Will reduce D. Would reduce
4/ it's a time for family...... and decorate their homes(clean)
5/ if you ........ a UFO, what would you do??(see)
6/ in Australia, a tropical storm ........... as a 'cyclone' (know)
7/ everything is going well. We.......... any problem so far (not have)