时间状语从句专项练习

1. I learnt her hard-working and kind _______ I got to know her in the bookstore.
A. first time B. for the first time
C. the first time D. by the first time
2. It was not _______ he took off his dark glass I realise who he was.
A. when; that B. until; when
C. when; then D. until; that
3. It was 19 years _______ Mandela, the former president of South Africa, was set free from prison.
A. before B. since C. until D. that
4. _______ had the bell rung _______ the students took their seats.
A. Hardly; when B. No sooner; when
C. Hardly; than D. No sooner; then
5. We walked along the beach for nearly three hours _______ we saw a boat on the sea.
A. when B. before