钻进中正常，接单根时溢流，（）。
A、应该提高钻井液密度
B、不应该提高钻井液密度
参考答案：A
-- We could invite John and Barara to the Friday night party.
--Yes, ____? I’ll give them a call right now.
A．why not
B．what for
C．why
D．what
(2013·济南市三模)One evening Harry phoned me, ________ me to come to his flat as soon as possible.
A．asked
B．having asked
C．asking
D．being asked
