Mong các anh chị giải thích vì sao chọn đáp án đó ạ

Mong anh chị giải thích vì sao lại chọn đắp án đó ! ( hoặc ghi công thức cũng được ạ )

CHO EM XIN CẤU TRÚC ĐỂ CÂU NÀY VỚI Ạ Rewrite the sentences The box is very small. He can’t put such a toy into it. ( enough) ____________________________________________ Finish your homework or you can’t go out with your friends ( if ) _______________________________________________ 7. Minh last wrote to his pen pal five months ago. ( Minh hasn’t) ____________________________________________ The water was so cold that she couldn’t make any tea. ( too) __________________________________________________ I don’t have enough money, so I can’t buy that iphone. ( if) ________________________________________________