$\text{1.B}$
$\text{⇒Cấu trúc:S + promise +(not)+ to Vinf }$
$\text{2.C}$
$\text{⇒Cấu trúc:I don’t mind + Ving;Cấu trúc:S + (‘d rather) + V}$
$\text{3.B}$
$\text{⇒Cấu trúc:Would you like + to verb (infinitive)?}$
$\text{4.C}$
$\text{⇒Cấu trúc:S + keep (on) + V-ing}$
$\text{5.C }$
$\text{⇒Cấu trúc:S + have trouble+Ving}$