Teachers have found the overhead projector to be invaluable as a teaching aid. Teachers have found that the overhead projector _____.

to be invaluable as a teaching aid

is invaluable as a teaching aid

was invaluable as a teaching aid

invaluable as a teaching aid

উত্তর সিলেক্ট করলে সঠিক ও ভুল দেখাবে।

ব্যাখ্যা ও সঠিক সমাধান

উত্তর: is invaluable as a teaching aid

বিস্তারিত সমাধান