1. Much new and high technology has been introduced from America, _____ great increase in production of the company.

A. resulting in      B. resulted in      

C. leads to     D. having led to

2. Much to the couple’s comfort, their income is now double ___________ it was five years ago.

A. that    B. than   C. which   D. what

3. It is a good plan in theory, but it ___________ to be seen whether it works in practice.

A. waits   B. stays   C. stands   D. remains