Ⅰ.单句语法填空
1．The trade agreement helped (to) strengthen (strength)the bonds between the two countries.
2．Concerned (concern)about the health of her son，Mrs.Jackson went to school to visit him every week.
3．It is urgent that food and clothing (should) be sent (send)to the sufferers.
4．Although built (build) ten years ago，the house still looks new.
5．In China，masses (mass) of graduates go abroad to have a further study every year.
6．Conditions were so bad that it was impossible for him to find the trail again.
7．The meeting to be held (hold)tomorrow is important.
8．I didn't mean to eat anything but the ice cream looked so good that I couldn't help trying (try) it.
9．The flowers give out a sweet smell，which makes us relaxed.
10．Big sporting events，concerts and exhibitions can increase the cost of accommodation and make it harder to find a room.
