Question

Какой предлог нужно ставить в эти выражения I cannot let you go on your own ________ you know the place very well. _______ I didn't know what to say, I kept silence.

Answer 1

1even though
2because
..............................

Answer 2

В первом предложении нужно использовать предлог "unless":

"I cannot let you go on your own unless you know the place very well."

Во втором предложении нужно использовать предлог "but":

"I didn't know what to say, but I kept silence."