A. as B. until C. because D. though

A．asB．sinceC．becauseD．until

运行下列程序：Private Sub Form_Click（)Dim y As Integer, x As IntegerDo Until x > 20x

【C2】A．If onlyB．Just asC．No soonerD．As though

【C6】A．butB．andC．becauseD．though

A. If B. Since C. Though D. When

45 A. until B. as C. before D. unless