Question

He earned enough money to start his own business _____ offering guide services _____ tourists.

A．by; to	B．with; at
C．on; for	D．through; with

Answer 1

A

介词by可以表示手段、原因，常置于动名词前，如：You can make the cake by mixing eggs and flour. 其次考查介词与动词offer的搭配，offer sth. to sb. =" give" sth. to sb.其中的to表示对象。