问题补充:
You should make a careful plan the experiment.
A. before to do
B. before doing
C. after to do
D. after doing
答案:
A. before to do
(答案→)B. before doing
C. after to do
D. after doing
解析:可联系答.案.网客服索取。
时间:2024-02-27 09:02:39
You should make a careful plan the experiment.
A. before to do
B. before doing
C. after to do
D. after doing
A. before to do
(答案→)B. before doing
C. after to do
D. after doing
解析:可联系答.案.网客服索取。