路基施工的基本方法有哪几种？
参考答案：
（1）人工施工（2）简易机械化施工（3）水力机械化施工（4）爆破法施工（5）机械化施工
-Hello, Sandy. This is Jack. What are you doing?
-I’m watching a match. It started at 7 p.m. and _____ on for another half an hour.
A．has been
B．was
C．had been
D．will be
Anne asked Jim _____ she could borrow a pen from him. [ ]
A. who
B. what
C. which
D. whether
