Question

I was _________ writing to him when he telephoned to me saying that he would come to see me on National Day．

1. A.
   thinking of
2. B.
   about to
3. C.
   just thinking
4. D.
   thinking about

Answer 1

A
句意：我正想到要給他寫一封信，這時(shí)他打電話來說要在國慶節(jié)來看我。要注意：was about to后面是不定式，與when連用時(shí)，表示“正想做某事，這時(shí)發(fā)生了另一件事”。