Unit 3
　　1. It was in the 1960s__________________________(两国的贸易达到了最高点).
　　2. ______________________ (无论我们遇到怎样的困难),we'll help one another to overcome them.
　　3. He always did well at school every now and then. _____________________ (尽管得做兼职) every now and then.
　　4. Without proper lessons, you could __________________________ (染上许多陋习)when playing the piano.
　　5. I suggested he__________________________(适应他的新环境).

　　Unit 3
　　1. that the trade between the two countries reached its highest point
　　2. Whatever / No matter what difficulties we may come across
　　no matter what whatever / no matter what difficulties;
　　3. in spite of having to do part-time jobs
　　5.( should ) adapt himself to his new conditions