2019年mpa考试英语真题——连词1651

{01} Some experts have said that ________ children believe they can succeed, they will never become totally confident of themselves. A.if B.since C.once D.unless 解析：D 考察状语从句。根据语境可知，unless引导条件状语从句，if如果，since自从，once曾经，一旦；句义：一些专家说，除非孩子们相信他们能够成功，否则他们永远不会对自己完全自信。故D正确。
本题选D。
{02}He is so busy.He cannot afford enough time with his son________he wants to.(2013·四川，7) A.even if B.as if C.because D.before 解析：A
解析　本题考查让步状语从句。句意为：他很忙，即使想抽出足够的时间陪陪儿子也做不到。even if即使；as if好像；because因为；before在……之前。
本题选。