Question

It's time we ____ the lecture because everybody has arrived. a. start b. will start c. started d. s

It's time we ____ the lecture because everybody has arrived.
a. start
b. will start
c. started
d. shall start

Answer 1

C.
It's time that +从句 用于虚拟语气，从句为过去时态

It's time总结：
1）It's time to do sth 如 It's time to go。
2）It's time for sb to do sth 其中sb为宾语，当sb是代词时，用宾格，如It's time for us to sleep。
3）It's time that +从句 用于虚拟语气，从句为过去时态
如：It's time that we went to sleep。

Answer 2

It's time we start the lecture because everybody has arrived.