Question

They tried several times to       the problem, and in the end they succeeded.

A．give up

B．work out

C．look through

D．think of

Answer 1

B

本題的含義應(yīng)該是他們幾次嘗試解決這個(gè)問(wèn)題，最后成功了，work out表示解決的意思，與句意較符合，故選B。