Hes not our______son—we adopted him when he was three.A．primitiveB．naturalC．firstD．origina

As he has ___ our patience, we’ll not wait for him

Not only ______ our money, but we were also in danger of losing our lives. A：we lost B：

______the atmosphere around our Earth, we would not be able to live.A．Had it not been forB

We do not hesitate to give our lives for our country,______suffer some hardships.A．let dow

We do not have a _______ school in our institute The highest degree we provide for the stu

______ we would not have succeeded in our experiment. ( )