30:17
STRUCTURE
2538 Views
01:56
READING COMPREHENSION &VOCABULARY
1436 Views
01:52
The Form of Irregular Verbs
1453 Views
01:59
The Tense of the Passive Voice
1552 Views
09:31
Changing from Active into Passive
1307 Views
07:20
The Form of the Passive Voice
1522 Views
03:29
What is the Passive Voice?
1556 Views
03:45
The Form of the Active Voice
1506 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
1995 Views
03:20
Since vs For
1651 Views
04:50
Have or Has
1468 Views
00:49
Key Words: Present Perfect
3363 Views
09:03
The Use of the Present Perfect
1473 Views
03:08
Meaning and Form
1526 Views
02:40
Writing Formal Letters
1511 Views
03:10
Language Use
2095 Views
09:35
Parallel Structure
1668 Views
04:35
Prepositions of Instruments and Means
1481 Views
03:27
Polite Requests
1574 Views
06:30
May as a Modal of Permission and Request
1581 Views
04:11
Can as a Modal of Permission and Request
1381 Views
02:50
عناصر الاداء
1423 Views
03:45
شركة ستيرن
990 Views
01:15
مقياس القيمة المضافة
1280 Views
02:58
مقياس الربحية
1173 Views
02:39
معايير دركر
1367 Views
03:51
مقايس الاداء
1337 Views
01:41
اتخاذ اجراءات تصحيحية
1035 Views
01:52
المرحلة الثانية من الرقابة
1107 Views
02:49
مراحل الرقابة
2452 Views