30:17
STRUCTURE
2402 Views
01:56
READING COMPREHENSION &VOCABULARY
1338 Views
01:52
The Form of Irregular Verbs
1354 Views
01:59
The Tense of the Passive Voice
1421 Views
09:31
Changing from Active into Passive
1205 Views
07:20
The Form of the Passive Voice
1407 Views
03:29
What is the Passive Voice?
1450 Views
03:45
The Form of the Active Voice
1405 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
1843 Views
03:20
Since vs For
1551 Views
04:50
Have or Has
1369 Views
00:49
Key Words: Present Perfect
3229 Views
09:03
The Use of the Present Perfect
1365 Views
03:08
Meaning and Form
1411 Views
02:40
Writing Formal Letters
1404 Views
03:10
Language Use
1988 Views
09:35
Parallel Structure
1558 Views
04:35
Prepositions of Instruments and Means
1373 Views
03:27
Polite Requests
1458 Views
06:30
May as a Modal of Permission and Request
1441 Views
04:11
Can as a Modal of Permission and Request
1259 Views
02:50
عناصر الاداء
1372 Views
03:45
شركة ستيرن
938 Views
01:15
مقياس القيمة المضافة
1224 Views
02:58
مقياس الربحية
1141 Views
02:39
معايير دركر
1298 Views
03:51
مقايس الاداء
1308 Views
01:41
اتخاذ اجراءات تصحيحية
1009 Views
01:52
المرحلة الثانية من الرقابة
984 Views
02:49
مراحل الرقابة
2329 Views