The plane -t---- off at 4：30 pm this afternoon.

The plane 【takes】off at 4：30 pm this afternoon.
飞机将在今天中午4点半起飞.
take off
(鸟等)起跳；跳起来；(飞机等)起飞
The plane took off from the airport and headed south towards Hong Kong.
飞机从机场起飞往南向香港飞去.
飞机起飞等时刻表上规定的要用一般现在时.
Try to catch the ball before it 【drops】(落下).