Ⅰ.单句语法填空
1．In the zoo，the number of visitors is tightly ______(limit) to avoid putting stress on the animals.
【答案】 limited
2．Not only food and clothing but also medical treatment has been provided ______ the people ______ need it in the flooded areas.
【答案】 for；who
3．When we use metals，it is important to know how they react ______ different substances.
【答案】 with
4．In April，thousands of holidaymakers remained ______ (stick) abroad due to the volcanic ash cloud.
【答案】 stuck
5．This DVD player is connected ______ TV set.
