砂石桩法包括下列（）。
A.砂石桩
B.砂桩
C.碎石桩
D.水泥土桩
参考答案：A, B, C
— Can we ask Jeff for help with our English?
— You’d better not. He is the last person _______ others.
A．helps
B．helped
C．helping
D．to help
The petrol in the car ____ on our way to the beach, so we had to walk there.
A．gave up
B．gave off
C．gave in
D．gave out
