一、用括号内所给词的正确形式填空。
1. Our group felt excited because we (solve) the maths problem finally.
2. She is outgoing and enjoys (perform) in front of a lot of people.
3. Your cat sleeps all day. It seems (lazy) than mine!
4. The Chinese teacher (compare) the two texts in class just now.
5. I think Lucy is (shy) than her twin sister.

1. solved
2. performing
3. lazier
4. compared
5. shyer

1. 根据“felt”可知句子时态为一般过去时，所以要用solve的过去式solved。
2. “enjoy doing sth.”是固定搭配，意为喜欢做某事，所以用perform的动名词形式performing。
3. 根据“than”可知要用比较级，lazy的比较级是lazier。
4. 根据“just now”可知句子时态为一般过去时，所以用compare的过去式compared。
5. 根据“than”可知要用比较级，shy的比较级是shyer。

二、从方框中选择适当的词并用其正确形式填空。
| alone | loud | quiet | hard - working | outgoing |
1. My sister is very . She likes to talk with different people.
2. He speaks much than before, so I can hear him clearly.
3. Tom is a student in our class. He always gets good grades.
4. My mother often tells me not to go out at night.
5. My sister is as as me. We both like reading instead of doing outdoor activities.

1. outgoing
2. louder
3. hard - working
4. alone
5. quiet

1. 根据“She likes to talk with different people.”（她喜欢和不同的人交谈），可知姐姐性格外向，所以选“outgoing”。
2. 由“so I can hear him clearly”（所以我能清楚地听到他说话），可知他说话比以前更大声，than提示用比较级，所以选“loud”的比较级“louder”。
3. 从“He always gets good grades.”（他总是取得好成绩），可知汤姆很用功，所以选“hard - working”。
4. “My mother often tells me not to go out...”（我妈妈经常告诉我不要晚上…… 出去），这里需要一个副词修饰动词“go out”，“alone”表示独自，符合语境。
5. “We both like reading instead of doing outdoor activities.”（我们都喜欢读书而不喜欢做户外活动），可知姐姐和我一样安静，as...as中间用原级，所以选“quiet”。