题目

       ，and the problem would be straightened out. A.A bit more effort                                                 B.Having a little effort C.If you have a bit more effort                          D. There being a little effort 答案：A 解析: 考查句型：名词短语/祈使句+and/or+结尾句。如选C项，应去掉题干中的连词and。E-mail，as well as telephones，　　　 an important part in daily communication． 　 A．is playing　　 B．have played　　 C．Was playing　　 D．play