——My sister is a typist at a foreign firm.——I know this sort of work( )skill and speed.A、asks for B、calls for C、looks for D、waits for为什选B不选A?

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——Mysisterisatypistataforeignfirm.——Iknowthissortofwork()skillandspeed.A、asksforB、callsforC、looksfor

——My sister is a typist at a foreign firm.——I know this sort of work( )skill and speed.A、asks for B、calls for C、looks for D、waits for为什选B不选A?
——My sister is a typist at a foreign firm.——I know this sort of work( )skill and speed.
A、asks for B、calls for C、looks for D、waits for
为什选B不选A?

——My sister is a typist at a foreign firm.——I know this sort of work( )skill and speed.A、asks for B、calls for C、looks for D、waits for为什选B不选A?
ask for 要求,请求,一般是人作主语,
call for 表示:需求,要求.
句意:我姐姐是一家外国企业的打字员.--我知道这样的工作【需要】技能和速度.

calls for是需要某种能力 asks for是某人需要某样东西

选B,意思是这项工作要求技巧和速度