——Did Tom come back late last night?
——No. It was not yet 8 o’clock ____ he arrived home.
A. before B. when C. that D. until
Our school has about 100 computers, but only sixty percent ____ used regularly.
A. is B. are C. was D. were
Imagine how excited we were ____ that our schoolmates had been admitted to some famous universities.
A. learning B. having learned
C. to be learning D. to learn
Mum, I need a new schoolbag. Could you buy _______ for me tomorrow?
A. it B. that C. one D. another
On March14, 2013, Xi Jinping was elected_______ president of _______ People’s Republic of China.
A. a; the B. /; / C. /; the D. the; the
作为即将进入高三的学生，将要面对更繁重的学习和生活压力，因此，保持积极心态非常重要。现在，请围绕“积极心态与健康、学习、交友及家庭生活"四个方面的关系，以Keeping a Positive Attitude为题目，写一篇英语短文，阐述你的观点及理由。
注意：1．词数：120字左右；。
2．短文题目已给出，并不计入总词数。
Keeping ,a Positive Attitude
