وقتی که در یک جمله دو عبارت دارید؛ باید آنها را بطور صحیح به هم وصل کنید. یک راه برای اتصال دو عبارت استفاده از and , but, or, so, yet بین عبارات است.
Tom is singing, and paul is dancing.
Tom is tall, but paul is short.
Tom must write the letter, or paul will do it.
Tom told a joke, so paul laughed.
Tom is tired, yet he is not going to sleep.
مثال :
A power failure occurred, _______the lamps went out.
A) then
B) so
C) later
D) next
پاسخ صحیح : B