---What do you think of my shirt? It _______ cotton.---It looks nice on you .A, is made inB. is made forC. is made ofD. is made by
Singapore is a good place________a holiday.
There are________people who want to travel to China.
—________she________to Singapore before? —Yes.She________there last week.
Last term he had problems________math.
It’s said that________of the water around the world polluted.