We _______ the lessons for half a year．We are sure we can make it．（ ）
A．reviewB．reviewed
C．have reviewedD．are reviewing
Welcome to Los Angeles．Have you ever been here？
Sure．I visited this city three years ago so this is my ____ time here．（ ）
A．firstB．secondC．thirdD．fourth
Do you know that the Terracotta Army in China is more than 2，000 years old？
Wow!____!（ ）
A．How large it is
B．How modern it is
C．What a long history it has
D．What a beautiful place it is
When an earthquake happens，I think the most important safety _____ is to keep calm（ ）
A．ruleB．doubtC．conditionD．problem
Hearing the good news，Betty laughed and ran out of the classroom（ ）
A．sadlyB．quietlyC．angrilyD．excitedly
I can't believe it．Tony has invented a tree﹣planting machine．
Really？He is so（ ）
A．shyB．rudeC．creativeD．friendly