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).

1. that the trade between the two countries reached its highest point

It is /was... that

Yesterday my mother threw a bad egg at the manager. It was yesterday that my mother threw a bad egg at the manager. It was my mother who / that threw a bad egg at the manager. It was a bad egg that my mother threw at the manager yesterday. It was at the manager that my mother threw a bad egg yesterday.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