153 Dave is better at maths than Mary
154 If we plant more trees, the air will be fresher
155 Althought she is short,she still plays basketball
156 We have lived here since 15 years ago
157 How much do a cake and a orange cost?
158 The Mekong river is along river with 4,350 km lentgh,the Niger is along river with 4,200 km lentgh
159 If people throw rubbish into the right bin,they will keep the environment clean
160 Unless she works harder, she'll lose her job
161 If we use recycled products, we will save money.
162 Unless you keep your feet dry, you won't catch a cold
143 Ho Chi Minh is the crowdest city in Viet Nam
144 This is the first time I have visited this beutiful place
145 How much is a bowl of noodles?
146 I have learned English since 2000
147 We have never won a big match before
148 I haven’t seen him for a long time.
149 If we turn of the tap when brushing the teeth,we will save a lot of water
150 Unless we try to save our sources of energy, they will soon end
151 I think Vietnam is the most beutiful country in the world
152 If we will cycle to school every day, we will keep fitter
