বিসিএস জব সল্যুশন - রিভিশন৩২১টি পরীক্ষায় এসেছেপ্রশ্ন ৩৫Identify the correct sentence.কShe could not help but laughing at his silly jokeখShe could not but helping laugh at his silly jokeগShe could but help but laughing at his silly joke.ঘShe could not help laughing at his silly joke.উত্তর দেখুন