中国正逐渐告别()发展,走上“前人种树、后人乘凉”的绿色发展之路。
A.绿色
B.科技
C.持续
D.黑色
参考答案:D
At present ________ of the experiments ________done in labs after the new building has been finished.
A.four fifth; is
B.four fifths; are
C.four fifth; are
D.four fifths; is
试述焦虑与恐惧的异同点。