Which choice uses a colon correctly?
The library opens at 10:00
a. m. Saturday.
The library closes: at 500 p.m.
The library: closes at 5:00 p.m.
The library opens at 10;00 Saturday.
Answer: the correct answer is the library opens at 10:00 a. m. Saturday
Explanation: it is correct to use colons to separate hours and minutes when we write the time. In the other options colons are not necessary and a semi colon is not appropiate.