单项选择题
The ALE pin is connected to the latch on the low byte o...
单项选择题The ALE pin is connected to the latch on the low byte of an external address bus. （ ） A. 对 B. 错
By the time I got home, my grandmother ____ the dinner ...
单项选择题By the time I got home, my grandmother ____ the dinner and was watching TV.（ ）
James got lost in the city, ____ he had to ask for help...
单项选择题James got lost in the city, ____ he had to ask for help.（ ）
