১৬৯৭৩
Today many new __ of language teaching are being experimented with.
উত্তর
techniques
১৬৯৭৪
Humans are the only factors in the ecosystem __ are responsible for the changes in the ecology.
উত্তর
which
১৬৯৭৭
My sister has just come back from abroad. She seems __ her trip very much.
উত্তর
to have enjoyed
১৬৯৭৯
Transform the sentence into negative without changing the meaning: "She tried all plans".
উত্তর
She left no plan untried