Exercise $13.$ Paying attention to the meanings of the sentences, fill in the blanks with the correctsubordinate conjunctions or similar expressions chosen from the pairs given in brackets.

I went for a walk$\_\_\_\_$ the sun was shining. $($because$,$ otherwise$)$

Do you know the stores are open today? $($as if$,$ whether$)$

We recognized her at once, we had not seen her for years. $($although$,$ in case$)$

$2.$ He kept reading he fell asleep. $($for$,$ until$)$

$3.$ The moon will rise the sun sets. $($as soon as$,$ than$)$

$4.$ It look! the train will be late. $($while$,$ as though$)$

$5.$ she got her degree, she became a teacher. $($After$,$ Than$)$

$6.$ We will not go skiing the weather is good. $($as if$,$ unless$)78$ le left, he made sure he had his keys with him. $($Before$,$ For$)8$ I told the truth, you would not believe me$.($Even if$,$ So that$)$

$9.$ They have known her she was a child. $($until$,$ since$)$

$10.$ I must leave now, I have a great deal of work to do$.($as$,$ than$)$

$11.$ What shall we do t rains? $($or else, supposing$)$

$12$ you read this book, you would be sure to enjoy it$.($If$,$ Until$)$

$13.$ The door was open, we could hear everything. $($in case, so$)$

$14.$ I studied more he did. $($than$,$ whereas$)$

$4.$ We packed a lunch we knew we would soon be hungry. $($lest$,$ for$)$

$16.$ I will join you, the weather is fine. $($providing$,$ than$)$

$17.$

$18.$ We must hurry he is very busy, he is seldom at home. $($Or else, Because$)$ we will be late. $($so that, or else$)$