5.Seated in a comfortable chair，listening to the peaceful music，you'll be brought into a 　　 (relax) state of mind.

解析：作定语要用形容词，表示人感到轻松的，用­ed形式的形容词。

答案：relaxed

4.(2010·佛山模拟)Games are often 　　 (excite) and dramatic，but they generally aren't very intellectual.

解析：作表语用形容词，指比赛“令人兴奋的”，用­ing形式的形容词。

答案：exciting

3.(2010·广州模拟)One of the 　　 (bad) gift choices I ever made was for my high school English teacher，Ms Chen.

解析：由the和I ever made可知，用bad的最高级。

答案：worst

2.He was very 　　 (happily) about his purchase and the price was reasonable.

解析：在系动词 be 后作表语，用形容词。

答案：happy

1.We drank together and talked 　　 (merry) till far into the night.

解析：修饰动词 talked，用副词形式。

答案：merrily

4.他30多岁时去了美国。

答案：He went to America in his thirties.

3.那个男孩买了几十支铅笔。

答案：The boy bought dozens of pencils.

2.这所大学十分之三的学生来自南方。

答案：Three students out of ten in this university come from the south.

1.地球是月球的50倍大。

答案：The earth is about fifty times as big as the moon.

4.Two 　　 (five) of the land in that district is covered with trees and grass.

答案：fifths